SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7faa1348b812e03f86f8a099586b22704d7b30a634a06b8b4ce7e44139ee2ba2' 
  AND token = 'AKM4FHgcuUzd//wsPmIDPpYd6DB6PHQK3ujLje5E+Tg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}